Vendor advisories

Citrix Security Bulletins

Browse 23 advisories from this official source. Search by product, CVE, severity, or advisory ID.

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23 advisories

Each date says whether the vendor published or updated the bulletin. A vendor bulletin describes products that may be affected. It does not prove that the vulnerable product or version is installed in your environment.

RSS for these results
Citrix Security BulletinsCTX697257
High

XenServer Security Update for CVE-2026-114406

XenServer's internal list of trusted certificate authorities (CAs) included a public CA whose intermediate certificates have been found to have weak keys. This would allow a malicious attacker on the management network to forge TLS certificates that appeared to be signed by th...

Affected productsXenServer
Vendor guidance

We have pushed updates to both the Early Access and Normal update channels of each of XenServer 8.4 and XenServer 9. We recommend that customers update to the latest version from their chosen channel following the ins...

Citrix Security BulletinsCTX697187
HighCVSS 8.5

Citrix UniconOS Security Bulletin CVE-2026-53562, CVE-2026-53563, and CVE-2026-53564

Citrix UniconOS is affected by the vulnerability described below

Affected productsCitrix UniconOS, The vulnerabilities affect the following supported versions of Citrix UniconOS (formerly eLux). Current Release (CR) Citrix UniconOS versions BEFORE 2607.2 Long Term Service Release (LTSR) Citrix UniconOS versions BEFORE 2603 LTSR CU2
Fixed versionsCitrix UniconOS 2607.2 and later versions, Citrix UniconOS 2603 LTSR CU2 and later versions
Vendor guidance

Citrix strongly recommends that customers upgrade their Citrix UniconOS to versions that contain the fixes as soon as possible. Citrix UniconOS versions that contain the fixes are: Current Release (CR) Citrix UniconOS...

Citrix Security BulletinsCTX697170
High

XenServer Security Update for CVE-2026-79610, CVE-2026-79610, CVE-2026-102700 and CVE-2026-102701

Several issues have been identified that affect XenServer 8.4 and XenServer 9. Three of these issues may allow a malicious privileged user in a guest VM to compromise or crash the host.

Affected productsXenServer
Vendor guidance

We have pushed updates to both the Early Access and Normal update channels of each of XenServer 8.4 and XenServer 9. We recommend that customers update to the latest version from their chosen channel following the ins...

Citrix Security BulletinsCTX697096
CriticalCVSS 9.5

Citrix NetScaler ADC and Citrix NetScaler Gateway Security Bulletin for CVE-2026-88771, CVE-2026-88772, CVE-2026-88773, CVE-2026-88774, CVE-2026-88775, CVE-2026-88776, CVE-2026-88777, and CVE-2026-88778

Citrix NetScaler ADC and Citrix NetScaler Gateway are affected by the vulnerabilities identified below

Affected productsCitrix NetScaler ADC and Citrix NetScaler Gateway, The following supported versions of Citrix NetScaler ADC and Citrix NetScaler Gateway are affected by the vulnerabilities: Citrix NetScaler ADC and Citrix NetScaler Gateway 14.1 BEFORE 14.1-73.37 Citrix NetScaler ADC and Citrix NetScaler Gateway 13.1 BEFORE 13.1-64.23 Citrix NetScaler ADC FIPS BEFORE 14.1-73.37 FIPS Citrix NetScaler ADC FIPS and NDcPP BEFORE 13.1-37.279
Fixed versionsCitrix NetScaler ADC and Citrix NetScaler Gateway 14.1-73.37 and later releases, Citrix NetScaler ADC and Citrix NetScaler Gateway 13.1-64.23 and later releases of 13.1, Citrix NetScaler ADC 14.1-FIPS 14.1-73.37 FIPS and later releases of 14.1-FIPS, Citrix NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1.37.279 and later releases of 13.1-FIPS and 13.1-NDcPP
Vendor guidance

Exploits of CVE-2026-88771 and CVE-2026-88772 on unmitigated NetScaler deployments have been observed.Cloud Software Group strongly urges affected customers of NetScaler ADC and NetScaler Gateway to install the releva...

Citrix Security BulletinsCTX697174
HighCVSS 8.7

Citrix NetScaler ADC and Citrix NetScaler Gateway Security Bulletin for CVE-2026-88779

NetScaler ADC and NetScaler Gateway is affected by the vulnerability described below

Affected productsCitrix NetScaler ADC and Citrix NetScaler Gateway, The following supported versions of NetScaler are affected by the vulnerability: Citrix NetScaler ADC and Citrix NetScaler Gateway 14.1 BEFORE 14.1-73.41 Citrix NetScaler ADC and Citrix NetScaler Gateway 13.1 BEFORE 13.1-64.28 Citrix NetScaler ADC FIPS BEFORE 14.1-73.41 FIPS Citrix NetScaler ADC FIPS and NDcPP BEFORE 13.1-37.282
Fixed versionsNetScaler ADC and NetScaler Gateway 14.1-73.41 and later releases, NetScaler ADC and NetScaler Gateway 13.1-64.28 and later releases of 13.1, NetScaler ADC 14.1-FIPS 14.1-73.41 FIPS and later releases of 14.1-FIPS, NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1-37.282 and later releases of 13.1-FIPS and 13.1-NDcPP
Vendor guidance

Cloud Software Group strongly urges affected customers of NetScaler ADC and NetScaler Gateway to install the relevant updated versions as soon as possible: NetScaler ADC and NetScaler Gateway 14.1-73.41 and later rele...

Citrix Security BulletinsCTX697191
CriticalCVSS 9.5

Citrix NetScaler ADC and Citrix NetScaler Gateway Security Bulletin for CVE-2026-107406

Citrix NetScaler ADC and Citrix NetScaler Gateway are affected by the vulnerability identified below

Affected productsCitrix NetScaler ADC and Citrix NetScaler Gateway, The following supported versions of Citrix NetScaler ADC and Citrix NetScaler Gateway are affected by the vulnerability if they meet the following conditions: NetScaler ADC or NetScaler Gateway must be configured as a SAML SP or SAML IdP, subject to the following version-specific requirements: For the following versions: Applicable only when configured as a SAML IdP: NetScaler ADC and NetScaler Gateway between 14.1-73.37 and 14.1-73.41, inclusive NetScaler ADC 14.1-FIPS between 14.1-73.37 FIPS and 14.1-73.41 FIPS, inclusive NetScaler ADC and NetScaler Gateway between 13.1-64.23 and 13.1-64.28, inclusive NetScaler ADC 13.1-FIPS between 13.1-NDcPP 13.1-37.279 and 13.1- 37.282, inclusive For the following versions: Applicable only when configured as a SAML SP or SAML IdP: NetScaler ADC and NetScaler Gateway before 14.1-73.37 NetScaler ADC 14.1-FIPS before 14.1-73.37 FIPS NetScaler ADC and NetScaler Gateway before 13.1-64.23 NetScaler ADC 13.1-FIPS before 13.1-NDcPP 13.1-37.279
Fixed versionsCitrix NetScaler ADC and Citrix NetScaler Gateway 14.1-73.46 and later releases, Citrix NetScaler ADC and Citrix NetScaler Gateway 13.1-64.29 and later releases of 13.1, Citrix NetScaler ADC 14.1-FIPS 14.1-73.46 FIPS and later releases of 14.1-FIPS, Citrix NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1.37.283 and later releases of 13.1-FIPS and 13.1-NDcPP
Vendor guidance

Cloud Software Group strongly urges affected customers of NetScaler ADC and NetScaler Gateway to install the following updated versions as soon as possible: Citrix NetScaler ADC and Citrix NetScaler Gateway 14.1-73.46...

Citrix Security BulletinsCTX696300
CriticalCVSS 9.3

NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2026-3055 and CVE-2026-4368

NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities mentioned below:

Affected productsNetScaler ADC and NetScaler Gateway, The following supported versions of NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities: CVE-2026-3055: NetScaler ADC and NetScaler Gateway 14.1 BEFORE 14.1-60.58 NetScaler ADC and NetScaler Gateway 13.1 BEFORE 13.1-62.23 NetScaler ADC FIPS and NDcPP BEFORE 13.1-37.262 CVE-2026-4368: NetScaler ADC and NetScaler Gateway 14.1-66.54 Note: CVE-2026-4368 only impacts build version 14.1-66.54.
Fixed versionsNetScaler ADC and NetScaler Gateway 14.1-66.59 and later releases, NetScaler ADC and NetScaler Gateway 13.1-62.23 and later releases of 13.1, NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1.37.262 and later releases of 13.1-FIPS and 13.1-NDcPP
Vendor guidance

CVE 2026-3055 was identified internally through our ongoing security reviews and broader efforts to strengthen the security of the product. Cloud Software Group strongly urges affected customers of NetScaler ADC and N...

Citrix Security BulletinsCTX697038
High

XenServer Security Update for Multiple Issues

Several issues have been identified that affect XenServer 8.4 and XenServer 9. Collectively, these issues may allow a malicious privileged user in a guest VM to compromise or crash the host.

Affected productsXenServer
Vendor guidance

We have pushed updates to both the Early Access and Normal update channels of each of XenServer 8.4 and XenServer 9. We recommend that customers update to the latest version from their chosen channel following the ins...

Citrix Security BulletinsCTX696734
HighCVSS 8.5

Citrix Secure Access Client for Windows and Citrix Endpoint Analysis Client for Windows Security Bulletin for CVE-2026-53565 and CVE-2026-53566

Citrix Secure Access Client for Windows and Citrix Endpoint Analysis Client for Windows contain the vulnerabilities mentioned below

Affected productsCitrix Secure Access Client for Windows and Citrix Endpoint Analysis Client for Windows, The following supported versions of Citrix Secure Access Client for Windows and Citrix Endpoint Analysis Client for Windows are affected by CVE-2026-53565: Citrix Secure Access Client for Windows versions BEFORE 26.6.1.20 Citrix Endpoint Analysis Client for Windows versions BEFORE 26.5.1.7 The following supported versions of Citrix Secure Access Client for Windows are affected by CVE-2026-53566: Citrix Secure Access Client for Windows versions BEFORE 26.6.1.20
Fixed versionsCitrix Secure Access Client for Windows 26.6.1.20 and later releases, Citrix Endpoint Analysis Client for Windows 26.5.1.7 and later releases
Vendor guidance

Cloud Software Group strongly urges customers of Citrix Secure Access Client for Windows and Citrix Endpoint Analysis Client to install the relevant updated versions as soon as possible: Citrix Secure Access Client fo...

Citrix Security BulletinsCTX696911
MediumCVSS 5.2

Citrix Workspace App for Mac Security Bulletin for CVE-2026-18751

Cloud Software Group strongly urges affected customers of Citrix Workspace App for Mac to install the relevant updated versions of Citrix Workspace App for Mac as soon as possible:

Affected productsCitrix Workspace App for Mac, The following supported versions of Citrix Workspace App for Mac are affected by the vulnerability: Citrix Workspace app for Mac before 2607
Fixed versionsCitrix Workspace app for Mac 2607 and later
Citrix Security BulletinsCTX696939
CriticalCVSS 9.3

NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2026-19489 and CVE-2026-19490

The following supported versions of NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities:

Affected productsNetScaler ADC and NetScaler Gateway, The following supported versions of NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities: NetScaler ADC and NetScaler Gateway 14.1 BEFORE 14.1-73.32 NetScaler ADC and NetScaler Gateway 13.1 BEFORE 13.1-63.21 NetScaler ADC FIPS BEFORE 14.1-73.32 FIPS NetScaler ADC FIPS and NDcPP BEFORE 13.1-37.277
Fixed versionsNetScaler ADC and NetScaler Gateway 14.1-73.32 and later releases, NetScaler ADC and NetScaler Gateway 13.1-63.21 and later releases of 13.1, NetScaler ADC 14.1-FIPS 14.1-73.32 FIPS and later releases of 14.1-FIPS, NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1-37.277 and later releases of 13.1-FIPS and 13.1-NDcPP
Vendor guidance

Cloud Software Group strongly urges affected customers of NetScaler ADC and NetScaler Gateway to install the relevant updated versions as soon as possible. NetScaler ADC and NetScaler Gateway 14.1-73.32 and later rele...

Citrix Security BulletinsCTX696836
High

XenServer Security Update for Multiple Issues

Several issues have been identified that affect XenServer 8.4 and XenServer 9. Collectively, these issues may allow a malicious privileged user in a guest VM to compromise or crash the host.

Affected productsXenServer
Vendor guidance

We have pushed updates to both the Early Access and Normal update channels of each of XenServer 8.4 and XenServer 9. We recommend that customers update to the latest version from their chosen channel following the ins...

Citrix Security BulletinsCTX696604
HighCVSS 8.8

NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2026-8451, CVE-2026-8452, CVE-2026-8655, CVE-2026-10816, CVE-2026-10817, and CVE-2026-13474

NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities mentioned below:

Affected productsNetScaler ADC and NetScaler Gateway, The following supported versions of NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities: NetScaler ADC and NetScaler Gateway 14.1 BEFORE 14.1-72.61 NetScaler ADC and NetScaler Gateway 13.1 BEFORE 13.1-63.18 NetScaler ADC FIPS BEFORE 14.1-72.61 FIPS NetScaler ADC FIPS and NDcPP BEFORE 13.1-37.272 Note: Secure Private Access Hybrid deployments using NetScaler instances are also affected by the vulnerabilities. Customers need to upgrade these NetScaler instances to the recommended NetScaler builds to address the vulnerabilities. This bulletin only applies to customer-managed NetScaler ADC and NetScaler Gateway. Cloud Software Group upgrades the Citrix-managed cloud services and Citrix-managed Adaptive Authentication with the necessary software updates.
Fixed versionsNetScaler ADC and NetScaler Gateway 14.1-72.61 and later releases, NetScaler ADC and NetScaler Gateway 13.1-63.18 and later releases of 13.1, NetScaler ADC 14.1-FIPS 14.1-72.61 FIPS and later releases of 14.1-FIPS, NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1.37.272 and later releases of 13.1-FIPS and 13.1-NDcPP
Vendor guidance

Cloud Software Group strongly urges affected customers of NetScaler ADC and NetScaler Gateway to install the relevant updated versions as soon as possible. NetScaler ADC and NetScaler Gateway 14.1-72.61 and later rele...

Citrix Security BulletinsCTX693420
CriticalCVSS 9.3

NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2025-5349 and CVE-2025-5777

NetScaler ADC and NetScaler Gateway contain the vulnerabilities mentioned below:

Affected productsNetScaler ADC and NetScaler Gateway, The following supported versions of NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities: NetScaler ADC and NetScaler Gateway 14.1 BEFORE 14.1-43.56 NetScaler ADC and NetScaler Gateway 13.1 BEFORE 13.1-58.32 NetScaler ADC 13.1-FIPS and NDcPP BEFORE 13.1-37.235-FIPS and NDcPP NetScaler ADC 12.1-FIPS BEFORE 12.1-55.328-FIPS Note: NetScaler ADC and NetScaler Gateway versions 12.1 and 13.0 are now End Of Life (EOL) and are vulnerable. Customers are recommended to upgrade their appliances to one of the supported versions that address the vulnerabilities.
Fixed versionsNetScaler ADC and NetScaler Gateway 14.1-43.56 and later releases, NetScaler ADC and NetScaler Gateway 13.1-58.32 and later releases of 13.1, NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1-37.235 and later releases of 13.1-FIPS and 13.1-NDcPP, NetScaler ADC 12.1-FIPS 12.1-55.328 and later releases of 12.1-FIPS
Vendor guidance

Cloud Software Group strongly urges affected customers of NetScaler ADC and NetScaler Gateway to install the relevant updated versions as soon as possible. NetScaler ADC and NetScaler Gateway 14.1-43.56 and later rele...

Citrix Security BulletinsCTX696811
Medium

XenServer Security Update for CVE-2026-42491

An issue has been identified in the XenServer management API SDK that may allow an attacker on the management network who is able to intercept specific HTTPS requests within a higher-level operation to be able to act with the privileges of the intercepted administrator. This i...

Affected productsXenServer
Vendor guidance

We have released updated versions of both XenCenter and the SDK. We recommend that customers update their existing XenCenter to the latest version using the built-in update functionality as documented at https://docs....

Citrix Security BulletinsCTX696581
Medium

XenServer Security Update for CVE-2025-54518

AMD has disclosed an issue in AMD Zen 2-based CPUs that may allow code in a guest VM to compromise the host. Although this hardware vulnerability is not an issue in the XenServer product itself, for the convenience of customers we are providing an update that mitigates this CP...

Affected productsXenServer
Vendor guidance

We have pushed updates to both the Early Access and Normal update channels of XenServer 8.4. We recommend that customers update to the latest version from their chosen channel following the instructions at https://doc...

Citrix Security BulletinsCTX695797
Medium

XenServer Security Update for CVE-2025-62626

This issue only affects certain AMD CPUs; customers who are running Intel-based systems are not affected by this issue.

Affected productsXenServer, These issues affect XenServer 8.4. (Note that Citrix Hypervisor 8.2 CU1 is now End of Life (EoL) and so no longer receives security updates or security bulletins.)
Vendor guidance

We have pushed updates to both the Early Access and Normal update channels of XenServer 8.4. We recommend that customers update to the latest version from their chosen channel following the instructions at https://doc...

Citrix Security BulletinsCTX695195
High

XenServer Security Update for CVE-2025-27466, CVE-2025-58142, CVE-2025-58143 and CVE-2025-58146

Several issues have been identified in XenServer 8.4 that collectively may allow privileged code in a guest VM to compromise or crash the host.

Affected productsXenServer, These issues affect XenServer 8.4. (Note that Citrix Hypervisor 8.2 CU1 is now End of Life (EoL) and so no longer receives security updates or security bulletins.)
Vendor guidance

We have pushed updates to both the Early Access and Normal update channels of XenServer 8.4. We recommend that customers update to the latest version from their chosen channel following the instructions at https://doc...

Citrix Security BulletinsCTX696562
Medium

XenServer Security Update for CVE-2026-23562 and CVE-2026-42486

Two issues have been identified that affect XenServer 8.4 that each may allow a logged-in host administrator to escalate their privileges to a higher level than defined by their RBAC role. These issues have the following identifiers:

Affected productsXenServer
Vendor guidance

We have pushed updates to both the Early Access and Normal update channels of XenServer 8.4. We recommend that customers update to the latest version from their chosen channel following the instructions at https://doc...

Citrix Security BulletinsCTX696527
High

XenServer Security Update for Multiple Issues

An issue that may, in some circumstances, allow a malicious privileged user in a guest VM to compromise the host. This issue has the following identifier:

Affected productsXenServer
Vendor guidance

We have pushed updates to both the Early Access and Normal update channels of XenServer 8.4. We recommend that customers update to the latest version from their chosen channel following the instructions at https://doc...

Citrix Security BulletinsCTX696397
Medium

XenServer Security Update for CVE-2026-4397

An issue has been identified in XenServer 8.4 which, when starting a VM on a host with limited available memory, may allow a privileged user in that newly starting VM to access memory data of a previously terminated VM. This issue has the following identifier:

Affected productsXenServer, This issue affects XenServer 8.4. (Note that XenServer 9 is in Public Preview; releases in preview state are not intended for production use and so are not covered by security bulletins until they exit preview state.)
Vendor guidance

We have pushed updates to both the Early Access and Normal update channels of XenServer 8.4. We recommend that customers update to the latest version from their chosen channel following the instructions at https://doc...

Citrix Security BulletinsCTX696350
High

XenServer Security Update for CVE-2026-23554

An issue has been identified in XenServer 8.4 that may allow privileged code in a guest VM to compromise the host. This issue has the following identifier:

Affected productsXenServer, This issue affects XenServer 8.4. (Note that XenServer 9.0 is in Public Preview; releases in preview state are not intended for production use and so are not covered by security bulletins until they exit preview state.)
Vendor guidance

We have pushed updates to both the Early Access and Normal update channels of XenServer 8.4. We recommend that customers update to the latest version from their chosen channel following the instructions at https://doc...

Citrix Security BulletinsCTX695486
Medium

NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2025-12101

NetScaler ADC and NetScaler Gateway are affected by the vulnerability mentioned below:

Affected productsNetScaler ADC and NetScaler Gateway, The following supported versions of NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities: NetScaler ADC and NetScaler Gateway 14.1 BEFORE 14.1-56.73 NetScaler ADC and NetScaler Gateway 13.1 BEFORE 13.1-60.32 NetScaler ADC 13.1-FIPS and NDcPP BEFORE 13.1-37.250-FIPS and NDcPP NetScaler ADC 12.1-FIPS and NDcPP BEFORE 12.1-55.333-FIPS and NDcPP Note: NetScaler ADC and NetScaler Gateway versions 12.1 and 13.0 are now End Of Life (EOL) and are vulnerable. Customers are recommended to upgrade their appliances to one of the supported versions that address the vulnerabilities.
Fixed versionsNetScaler ADC and NetScaler Gateway 14.1-56.73 and later releases, NetScaler ADC and NetScaler Gateway 13.1-60.32 and later releases of 13.1, NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1-37.250 and later releases of 13.1-FIPS and 13.1-NDcPP, NetScaler ADC 12.1-FIPS and 12.1-NDcPP 12.1-55.333 and later releases of 12.1-FIPS and 12.1-NDcPP
Vendor guidance

Cloud Software Group strongly urges affected customers of NetScaler ADC and NetScaler Gateway to install the relevant updated versions as soon as possible. NetScaler ADC and NetScaler Gateway 14.1-56.73 and later rele...

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